Corydoras Bulging Red Eye

[JohnG]

Hi...... I've got a tank with a Male Betta, 4x Peppered Corydoras and a small Pleco. I've just noticed that one of the corys has a red bulging eye. It looks a little bit cloudy as well. It was def ok 2 days ago but not sure what it could be or what I need to do. I'll need to treat the tank but with what and will it be ok with the fish that are also in there??? Help.!!!!!

 

[WILDER]

Has he caught his eye on something in the tank.
What are your stats in ammonia,nitrite,nitrate,and ph.
Corys are very prone to bacterial infection, I would treat the fish with a bacterial med.
Good luck.